Tongariro Alpine Crossing is a one day hiking tour and one of the nature highlights of the country.
Most of the walk is through raw volcanic terrain. The three volcanoes in the area are all highly active and the terrain reflects this. Solidified lava flows, loose tephra, and solidified volcanic lava bombs abound. Large amounts of minerals are brought to the surface and are highly visible in the colours of rocks and ridges. The lakes and pools on the walk are deeply coloured by the volcanic minerals dissolved in them.